本實驗採用固體消失法量測由二元酸、酚、甲醇與酯類所組成之雙成分及三成分混合物之固液相平衡數據。實驗結果顯示，在碳酸二苯酯＋酚的系統中會產生莫耳比為2：3的複合物，己二酸＋碳酸乙烯系統會產生4：1的複合物，己二酸＋碳酸二甲酯，戊二酸＋碳酸二甲酯與戊二酸＋碳酸乙烯皆會產生3：1的複合物。本研究依據實驗結果繪製出碳酸二苯酯＋酚＋碳酸二甲酯三成分固液相平衡圖，該固液相平衡圖有助於以結晶法或反應性結晶法分離出碳酸二甲酯與酚之轉酯化反應的主要產物-碳酸二苯酯。
本研究以NRTL和RSM (regular solution model) 模式加以關聯無複合物生成之雙成分系統固液相平衡數據；含有複合物生成之雙成分系統則以ICM (ideal chemical model) 與modified RSCM模式加以關聯。ICM與modified RSCM皆能準確關聯碳酸二苯酯＋酚雙成分系統。另外，modified RSCM也能合理地預測碳酸二苯酯＋酚＋碳酸二甲酯三成分系統的固液相平衡邊界，同時也發現使用雙成分數據所訂參數之ICM模式，並不能準確預測該三成分系統之固液相平衡行為。

Solid-liquid equilibrium (SLE) data were measured with solid-disappearance method for various binary and ternary mixtures containing diacids, phenol, alcohol or ethers. The experimental results showed that a 2:3 adducted compound formed in the system of diphenyl carbonate + phenol, and 4:1 adducted compounds in the system of adipic acid + ethylene carbonate, and 3:1 adducted compounds in the system of adipic acid + dimethyl carbonate, glutaric acid + dimethyl carbonate, and glutaric acid + ethylene carbonate. A ternary SLE phase diagram was prepared for the system of diphenyl carbonate + phenol + dimethyl carbonate according to the experimental results. This phase diagram is useful in the development of processes to separate the diphenyl carbonate from the product mixture of transesterification of the dimethyl carbonate + phenol system via crystallization or reactive crystallization method.
The NRTL model and the regular solution model (RSM) were use to correlate the SLE data of the binary systems that do not form congruent compound. However the ideal chemical model (ICM) and the modified regular solution chemical model (modified RSCM) were used to correlated the SLE date for complex formation systems. The results serve to show that both the ICM and the modified RSCM can be used to satisfactorily correlate the phase equilibrium temperatures for the diphenyl carbonate + phenol system. Additionally the results show that the modified RSCM can be used to predict reasonably well the SLE phase boundaries for the ternary system of diphenyl carbonate + phenol + dimethyl carbonate. Nevertheless, the ICM with the parameters determined from binary data was unable to accurately predict the SLE behavior of this ternary system.

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